keep fouling new spark plugs..need advise please!!
10-17-09, 04:31 PM
#26
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hey jason...i also have the fjo injector box ...would that make a difference on the tune?..and I may found another problem ..when I took off the uim ..i found this. It looks like a drop of dried gasket sealer. This cant be good lol.
Last edited by kru510; 10-17-09 at 04:56 PM.
10-17-09, 05:52 PM
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ok so i am 90% confient that this is were my leak is ...so I cleaned up the lim and uim ...and all I can say is wow what a difference. I also clean the gasket with carb clean and made sure there was no debris anywhere on that..btw Jason thx for your input
10-17-09, 09:48 PM
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im using the stock metal gasket..i think i got a little gasket sealer on the lim when i was doing the block off plates. I have not started it yet because i need to get new plugs but will let you know on monday. I also changed the injector crank duty at +10 degress from 52 to 40ms and that also help with the flooding a bit. Jason would you recommend a twinamp for my mods?
Last edited by kru510; 10-17-09 at 09:56 PM.
10-19-09, 07:13 PM
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update: so I put everything back together and still no luck. It still is idling pig rich. The only thing I can think of is maybe the injector itself or o-ring is leaking. I was curious when I undid a vacuum line and the idle kinda sped up but smoothed out. Then I did 2 vacuum lines and and the idle sped up a little more. It hesitated a little bit but when I put the vacuum lines back on the idle slowed down.The a/f didnt change at all though. Its still 10.1-10.5. So at this point I dont have a vacuum leak. If the injector was leaking, wouldnt there be fuel dripping out that I could see. I am lost here.
10-19-09, 09:18 PM
#32
Pull the injectors out of the block and pressurize the system. Look for leaks. Check the primaries first then secondaries. Even with 850 primaries you should be able to get a leaner idle. Use more negative lag if needed. Do you have a datalogit? If so post up your map. While you're checking things, check your tps and map sensor readings too. Post up your pim voltage with the key on, car off, and car idling. Stock map sensor? Line is attached?
10-19-09, 09:31 PM
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Pull the injectors out of the block and pressurize the system. Look for leaks. Check the primaries first then secondaries. Even with 850 primaries you should be able to get a leaner idle. Use more negative lag if needed. Do you have a datalogit? If so post up your map. While you're checking things, check your tps and map sensor readings too. Post up your pim voltage with the key on, car off, and car idling. Stock map sensor? Line is attached?
Last edited by kru510; 10-19-09 at 09:35 PM.
10-19-09, 10:04 PM
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you want me to start the car and idle it with the uim off? or just half way on ?...when i turn the key with the injectors out of the block they just pop out of the fuel rail...well the pim with the car off is 2.67 volts...ok when i turned the car on and idled the pim didnt change at...it stayed at 2.67..and how do i post a copy of my map here...do i need to rename it?
Last edited by kru510; 10-19-09 at 10:28 PM.
10-19-09, 11:58 PM
#37
That's your problem! I was actually saying to start the car with the UIM on. So if you did start it with the UIM on and your PIM is 2.67 then your map sensor is not referencing vacuum and it's just dumping fuel. You're PIM should drop to like 1.6 or something when you have vacuum.
Make sure both ends are hooked up to the map sensor. Make sure you don't have a check valve installed inline in place of the small filter. Make sure the line is hooked up to a port on the UIM that sees both vacuum and positive pressure. Verify the map sensor works by hooking a mity vac up to it. Voltage should change based on vaccum and boost.
Make sure both ends are hooked up to the map sensor. Make sure you don't have a check valve installed inline in place of the small filter. Make sure the line is hooked up to a port on the UIM that sees both vacuum and positive pressure. Verify the map sensor works by hooking a mity vac up to it. Voltage should change based on vaccum and boost.
10-20-09, 12:06 AM
#39
If you had a vacuum leak, you would run leaner not richer. Sounds like your just running too rich by the injectors being too big or tune not right. Do like the guy said above- pull your injector rail out and pressurize the fuel system. Make sure the fuel injectors are not dripping. Then disable the ignition system and crank the engine over and check the fuel injector spray pattern. You should have a nice even mist from each injector. If any of the above is incorrect, then you have a bad fuel injector(s). If all that checks out, then your down to tune or too large of injectors. Oh and yeah, if your MAP sensor is not working or is not getting a correct vacuum source, then your car will run like dogshit.
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